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Species Zeauvigerina lodoensis Martin 1943 | ||||||
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| Diagnosis / Definition: | ||||||
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Pearson et al. (2006): DESCRIPTION. Type of wall: Microperforate, finely pustulose, lacking pore mounds. Test morphology: Test small, elongate, initially blunt then gradually tapering, oval in cross-section; periphery rounded rather than compressed; early chambers biserial throughout, slightly compressed, later becoming increasingly globular, gradually increasing in size, 14-16 in adult tests; sutures depressed nearly perpendicular to the growth axis; aperture nearly terminal on a short neck and raised from the base of the final chamber face. Size: Holotype length 0.32 mm, width 0.23 mm, breadth 0.10 mm; paratype (USNM 38953) length 0.32 mm, width 0.15 mm, breadth 0. l l mm. |
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| Discussion / Comments: | ||||||
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Pearson et al. (2006): DISTINGUISHING FEATURES- Distinguished from other zeauvigerinids by its more gently tapering test with a blunt initial end, more inflated adult chambers, necked aperture that is angled toward the apical axis rather than being terminal in position, and by lacking development of a uniserial final chamber. DISCUSSION- The taxonomic position, stratigraphic distribution and phylogeny of this species are uncertain since the type material is not well preserved and it has only been recorded in the Lodo Formation of California. PHYLOGENETIC RELATIONSHIPS.- May have been derived from Z. aegyptiaca during the late Paleocene. STRATIGRAPHIC RANGE.- Found only in the upper Paleocene-lower Eocene Lodo Fm., Lodo Gulch, Panoche Quadrangle, Fresno County, California (~Zone P4-E4). GEOGRAPHIC DISTRIBUTION.- This species has only been recorded in Califopia. STABLE ISOTOPE PALEOBIOL0GY.- No data are available. REPOSITORY.- Holotype originally deposited in the Paleontological Type Collection, Stanford University, California but may have been sent to the University of California, Berkeley Museum collections; paratypes (USNM 38953) deposited at the Smithsonian Museum of Natural History, American Museum of Natural History (#MT-1026), the California Academy of Sciences, and the Paleontological Research Institution. |
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| Systematics: | ||||||
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35 Ordo Foraminiferida Superfamilia Globigerinaceae Familia Heterohelicidae Genus Zeauvigerina Species Zeauvigerina lodoensis |
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| Synonym list: | ||||||
| Pearson et al. (2006): 1943 Zeauvigerina lodoensis Martin. - Martin : p.111 pl. 5; fig. 1 [lower
Eocene, Lodo Fm., Fresno County, California]
1994 Zeauvigerina lodoensis Martin. - Huber & Boersma : p.273 text-fig. 6b (illustration of USNM paratype)
2006 Zeauvigerina lodoensis Martin. - Pearson et al. : p.482 pl. 16.4; fig. 3, 4 (Pl. 16.4, Figs. 3,4: new SEMs of paratype of
Zeauvigerina lodoensis Martin)
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| Specimen: | ||||||
| Smithsonian Museum of Natural History, Washington, D.C., Inventory number: USNM 38953 American Museum of Natural History, Inventory number: MT-1026 |
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| References: | ||||||
Martin,L.T. (1943): Huber,B.T. and Boersma,A. (1994): Pearson,P.N.; Olsson,R.K.; Hemleben,C.; Huber,B.T. and Berggren,W.A. (2006): |
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| Anonymous: Unedited TaxonConcept data | ||||||
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